Roller-retainer.



F. H. CATHCART.

ROLLER RETAINER.

APPLIC l9l5. 1 ,220,1 85. Patend Man 27, 1917.

2 SSSSSSSSSS ET 1.

OFFICE.

FRANK HENRY AJJHCARI, on TRENTON, NEW JERSEY, ASSIGNOR ro AUTOMATC SHAFT COUPLING 00., CF ALEXANDRIA, VIRGINIA, A CORPORATION on DELAWARE.

ROLLER-REIAINER.

Specification of Letters Patent.

Patented Mar. 27, 1917.

Application filed lune 11, 1915. Serial No. 33,507.

T0 aZZ wkdm z't may concem:

a citizen of the United States, residing at Trenton, in the oounty 01: Mercer and State of N ew Jersey, have invented certain neW and useful Improvements in Roller-Retainors, of Which the following is a specification.

My invention relates to improvements in roller retainers, and more particularlyto roller retainers designed' for use in shaft grips for shaft couplings, or hubs' of Pulleys or other devices, the object of the invention being to provide improved means for elastically holding a roller or rollersin contact With a shaft to compel the same to move With the shaft andinsure a quick grip without danger 01 slipping.

A urther object is to provide a roller retainer Whieh is adapted for use in connection with a casing having an eccentric recess or with a casing having a concentric recess and in combination with a wedge.

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as Will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: r

Figure 1 is a view in longitudinal section illustrating one form of my invention in connection with a shaft coupling.

Fig. 2 is a view in cross section on the line 22 of Fig. 1.

Fig. 3 is a view similar to Fig. 2 illustrating my improvements 111 connection with a casing having a concentric recess and employmg a wedge 1n combmatmn Wlth the rollers for gripping the shaft.

Fig. 4: is a perspective view of my improved roller retainer.

Fig. 5 is a view in longitudinal section illustrating a modified form of my invention, showing the same in connection with a pulley hub, and

Fig. 6 is a view in section on the line 66 of Fig. 5. r

1, 1 represents shafts which are located in alinement and project into the casing 2 of my improved coupling. This casing 2 has bearings 3 at its ends, and a bearing 4 at its conter to receive the shafts 1, and between the bearings 3 and 4, recesses 5 are provided in the casing.

The recesses 5 are eccentric to the bearings and the shaft as shown clearly inFig. Be it known that I, FRANK H. CATHCART, r

2, and in these recesses, my improved roller retainers are locatd as Will now be described.

6, 6, are rollers with trunnions.7 at their ends mounted to turn in bearings 8 in wire frames 9. The roller retainer consists of two frames 9 having their intermediate portions bent forming the beaiings 8 above referred to, and their ends secured in tubes 10, so that they orm sprihg gripping tongues 11 at the ends'of the rollers. These spring gripping tongues 11 are of a length suffieient to engage the shaft at a point beyond the center thereof as shown clearly in Fig. 2. They grip the shaft vvith sufficient strength to compel the rollers to move with 1p. In Figs. 5 and 6, Tillustrate a modified form of my improved roller retainer in con nection With a pulley 15. This pulley 15 has a split hub 16 in Which an eCoentric recess 17 is provided to accommodate the rollers 18 for locking the hub and shaft 19 together. These rollers 18 have their trunnions 20 supported in curvedbars 21 at their ends, and to the ends of the curved bars, spring tongues 22 are secured. These spring tongues engage the sides of the shaft beyond the center, the same as the preferred form of my invention, and it is to be understood that this idea of spring members or flexible elastic pieces engaging the sides of the shaft to hold therollers thereagainstmay ,be modi the shaft until the rollers wedge between the L The function of the roller retainer is to s0 1 hold the roller or rollers against the shaft that the gripping operation Will be instantaneous with the turning of the shaft or casng, or the hub as the case may be in either direction without any slipping of the parts.

Various ]ight changes mght bemade in the general form and arrangement of parts described withont' departing from my invention, and hence I do not limit myself'to the precse detals set forth, but consider myself at liberty to make such changes and alteratiens as fairly a1l wthin the spirit and scope of the appended c1aims.

Having thns described my invention,what I daim as new and des1:e t0 secure by Letters Patent s:.

1. A roller retainer for shaft grips, comprisingfixible elastic means for supporting a roller, and adapted: to engage a shaft, substantially as described. 7

2. A roller retainer of the character described, comprising two grippingtongues adapted to engageopposite sides of a shaft, and means between the tongues for support ing a r01ler, substantiafly as described.

3. The combination wth a shaft, of a roller retaner of thecharacter described,

comprising bearings, roHers in the bearngs,

s ite sdes of said shaft beyond the center of the shaft,' substantially as described.

4;. The combination with a shaft, of a rol1en retainer of th character described,

comprieing two wire frames having 0011s in.

termediate their ends forming bearings, 1'011- 7 ers having trunnions on their ends loeated 1n the bear1ngs, and dewces connectmg the ends of said rames forming sprng tongues r adapted to engage opposite sides of the shaft, substantially as describecL 7 5. The combination with a shaft, and a casng having amecess therein around the shaft, of a roller in the recess, anda roller In testimony whereof I have signed my 4 nameto this specification in the presence of two subscr1b1ng w;tnesees.

FRANK HENRY CATHCART.

Witnessesc JNO. G. GRAHAM, CHARLES W. CA1ECARI.

Gopica of:this patent mayheebtained for five cents each,by:addressiig;the CommssionerofTatentg,

' Washington, 1); GJ 

